add tag colors to seed data and reverse tag order in project cards

- Add color parameter to seed tags (Rust red, Python blue, etc.)
- Reverse tag display order in ProjectCard (flex-row-reverse)
- Enable release binary stripping in Cargo.toml
- Increase Railway health check timeout to 120s
- Remove backup favicon/icon files

railway.json

@@ -2,6 +2,6 @@
   "$schema": "https://railway.com/railway.schema.json",
   "deploy": {
     "healthcheckPath": "/api/health",
-    "healthcheckTimeout": 30
+    "healthcheckTimeout": 120
   }
 }